126 lines
4.3 KiB
Python
126 lines
4.3 KiB
Python
import json
|
|
import random
|
|
import time
|
|
import board
|
|
import busio
|
|
from digitalio import DigitalInOut
|
|
import neopixel
|
|
from adafruit_esp32spi import adafruit_esp32spi, adafruit_esp32spi_wifimanager
|
|
import adafruit_esp32spi.adafruit_esp32spi_socket as socket
|
|
from adafruit_ntp import NTP
|
|
|
|
# Get wifi details and more from a secrets.py file
|
|
try:
|
|
from secrets import secrets
|
|
except ImportError:
|
|
print("WiFi secrets are kept in secrets.py, please add them there!")
|
|
raise
|
|
|
|
# ESP32 Setup
|
|
try:
|
|
esp32_cs = DigitalInOut(board.ESP_CS)
|
|
esp32_ready = DigitalInOut(board.ESP_BUSY)
|
|
esp32_reset = DigitalInOut(board.ESP_RESET)
|
|
except AttributeError:
|
|
esp32_cs = DigitalInOut(board.D13)
|
|
esp32_ready = DigitalInOut(board.D11)
|
|
esp32_reset = DigitalInOut(board.D12)
|
|
|
|
spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
|
|
esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)
|
|
|
|
"""Use below for Most Boards"""
|
|
status_light = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.2) # Uncomment for Most Boards
|
|
"""Uncomment below for ItsyBitsy M4"""
|
|
# status_light = dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1, brightness=0.2)
|
|
# Uncomment below for an externally defined RGB LED
|
|
# import adafruit_rgbled
|
|
# from adafruit_esp32spi import PWMOut
|
|
# RED_LED = PWMOut.PWMOut(esp, 26)
|
|
# GREEN_LED = PWMOut.PWMOut(esp, 27)
|
|
# BLUE_LED = PWMOut.PWMOut(esp, 25)
|
|
# status_light = adafruit_rgbled.RGBLED(RED_LED, BLUE_LED, GREEN_LED)
|
|
wifi = adafruit_esp32spi_wifimanager.ESPSPI_WiFiManager(esp, secrets, status_light)
|
|
|
|
print("Connecting to WiFi...")
|
|
|
|
wifi.connect()
|
|
|
|
print("Connected to WiFi!")
|
|
|
|
print("Getting the time...")
|
|
|
|
ntp = NTP(esp)
|
|
# Wait for a valid time to be received
|
|
while not ntp.valid_time:
|
|
time.sleep(5)
|
|
ntp.set_time()
|
|
|
|
print("Time:", str(time.time()))
|
|
|
|
# To use Azure IoT Central, you will need to create an IoT Central app.
|
|
# You can either create a free tier app that will live for 7 days without an Azure subscription,
|
|
# Or a standard tier app that will last for ever with an Azure subscription.
|
|
# The standard tiers are free for up to 2 devices
|
|
#
|
|
# If you don't have an Azure subscription:
|
|
#
|
|
# If you are a student, head to https://aka.ms/FreeStudentAzure and sign up, validating with your
|
|
# student email address. This will give you $100 of Azure credit and free tiers of a load of
|
|
# service, renewable each year you are a student
|
|
#
|
|
# If you are not a student, head to https://aka.ms/FreeAz and sign up to get $200 of credit for 30
|
|
# days, as well as free tiers of a load of services
|
|
#
|
|
# Create an Azure IoT Central app by following these instructions: https://aka.ms/CreateIoTCentralApp
|
|
# Add a device template with telemetry, properties and commands, as well as a view to visualize the
|
|
# telemetry and execute commands, and a form to set properties.
|
|
#
|
|
# Next create a device using the device template, and select Connect to get the device connection details.
|
|
# Add the connection details to your secrets.py file, using the following values:
|
|
#
|
|
# 'id_scope' - the devices ID scope
|
|
# 'device_id' - the devices device id
|
|
# 'key' - the devices primary key
|
|
#
|
|
# The adafruit-circuitpython-azureiot library depends on the following libraries:
|
|
#
|
|
# From the Adafruit CircuitPython Bundle (https://github.com/adafruit/Adafruit_CircuitPython_Bundle):
|
|
# * adafruit-circuitpython-minimqtt
|
|
# * adafruit-circuitpython-requests
|
|
from adafruit_azureiot import IoTCentralDevice
|
|
|
|
# Create an IoT Hub device client and connect
|
|
device = IoTCentralDevice(socket, esp, secrets["id_scope"], secrets["device_id"], secrets["key"])
|
|
|
|
print("Connecting to Azure IoT Central...")
|
|
|
|
# Connect to IoT Central
|
|
device.connect()
|
|
|
|
print("Connected to Azure IoT Central!")
|
|
|
|
message_counter = 60
|
|
|
|
while True:
|
|
try:
|
|
# Send telemetry every minute
|
|
# You can see the values in the devices dashboard
|
|
if message_counter >= 60:
|
|
message = {"Temperature": random.randint(0, 50)}
|
|
device.send_telemetry(json.dumps(message))
|
|
message_counter = 0
|
|
else:
|
|
message_counter = message_counter + 1
|
|
|
|
# Poll every second for messages from the cloud
|
|
device.loop()
|
|
except (ValueError, RuntimeError) as e:
|
|
print("Connection error, reconnecting\n", str(e))
|
|
# If we lose connectivity, reset the wifi and reconnect
|
|
wifi.reset()
|
|
wifi.connect()
|
|
device.reconnect()
|
|
continue
|
|
|
|
time.sleep(1)
|